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TitleOverview of Ni-Cu-(PGE), Cr-(PGE), and Fe-Ti-V magmatic mineralization in the Superior Province: insights on metallotects and metal endowment
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorHoulé, M G; Lesher, C M; Sappin, A -AORCID logo; Bédard, M -P; Goutier, J; Yang, X -M
SourceTargeted Geoscience Initiative 5: Advances in the understanding of Canadian Ni-Cu-PGE and Cr ore systems - Examples from the Midcontinent Rift, the Circum-Superior Belt, the Archean Superior Province, and Cordilleran Alaskan-type intrusions; by Bleeker, WORCID logo (ed.); Houlé, M G (ed.); Geological Survey of Canada, Open File 8722, 2020 p. 117-139, https://doi.org/10.4095/326890 Open Access logo Open Access
Year2020
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative 5: Advances in the understanding of Canadian Ni-Cu-PGE and Cr ore systems - Examples from the Midcontinent Rift, the Circum-Superior Belt, the Archean Superior Province, and Cordilleran Alaskan-type intrusions
File formatpdf
ProvinceManitoba; Newfoundland and Labrador; Ontario; Quebec
NTS21E; 21L; 21M; 22E; 22L; 22M; 22D; 23D; 23E; 23L; 31; 32; 33; 41; 42; 43; 52; 53; 62I; 62J; 63A; 63B; 63G; 63H; 63I; 63J; 62O; 62P
AreaLabrador
Lat/Long WENS-100.0000 -70.0000 55.0000 45.0000
Subjectseconomic geology; tectonics; Science and Technology; Nature and Environment; mineral deposits; metals; base metals; precious metals; nickel; copper; chromium; iron; titanium; vanadium; magmatic deposits; sulphide deposits; ore mineral genesis; mineralization; ore controls; modelling; metallotects; metallogeny; bedrock geology; lithology; igneous rocks; mafic rocks; ultramafic rocks; volcanic rocks; basalts; intrusive rocks; komatiites; tectonic setting; tectonic history; greenstone belts; magmatism; volcanism; intrusions; emplacement; flow regimes; mantle; erosion; deformation; fluid dynamics; sulphur; oxides; Archean; Superior Province; Wawa-Abitibi Subprovince; Bird River-Uchi-Oxford-Stull-La Grande Rivière-Eastmain (BUOGE) Superdomain; Abitibi Greenstone Belt; platinum group elements; Precambrian
Illustrationslocation maps; histograms; plots; tables
ProgramTargeted Geoscience Initiative (TGI-5) Nickel-copper-PGE-chromium systems
Released2020 09 08
AbstractThe Archean Superior Province is well known for its metal endowment. Ultramafic and mafic intrusions/flows are ubiquitous in greenstone belts across the Superior Province and are prospective hosts for magmatic Ni-Cu-(PGE), Cr-(PGE), and Fe-Ti-V deposits, although their abundance and endowment vary widely among the terranes/domains. For example, the Abitibi-Wawa terrane contains numerous but generally small Ni-Cu-(PGE) deposits, a few large Fe-Ti-V deposits, and only rare Cr mineralization. The Bird River-Uchi-Oxford-Stull-La Grande Riviere-Eastmain (BUOGE “superdomain”) domains are characterized by several moderate to very large chromite deposits, a few moderate to small Ni-Cu-(PGE) deposits, and a few potentially large Fe-Ti-V deposits that are characterized as prospects due to the lack of definition drilling. The other terranes/domains in the Superior Province, including the Au and Cu-Zn-Aurich Abitibi belt, contain some magmatic Ni-Cu-(PGE) and Fe-Ti-V mineralization, but no significant Cr- (PGE) mineralization. Many factors are responsible for the variable metal endowment, but some critical features appear to be particularly important and may define prospective Ni-Cu-(PGE), Cr-(PGE), and/or Fe-Ti- V metallotects. These include the presence of (1) abundant primitive mantle-derived magmas that were generated by large magmatic events over short durations; (2) magma compositions that favoured the generation of Ni-Cu-(PGE) (high-Mg komatiitic), Cr (low-Mg komatiitic), and Cu-Ni-PGE and Fe-Ti-V (basaltic) mineralization; (3) transcrustal discontinuities that focussed magma flow through the lower crust; (4) shallow structures and densities that favoured emplacement of channelized lava/magma conduits at relatively high levels, (5) high magma fluxes to promote thermomechanical erosion of crustal rocks; (6) high-level crustal rocks containing sulphur (e.g. sulphide-facies iron formation) and oxide (e.g. oxide-facies iron formation) reservoirs for generating and upgrading sulphide xenomelts and oxide xenocrysts; and (7) favourable deformation and erosion to preserve and expose prospective units for exploration. Targeting base and precious metals is challenging, even in well endowed but partially exposed greenstone belts. However, understanding these fundamental controls will help in the discover of additional resources in other frontier areas within the Superior Province and throughout the Canadian Shield.
Summary(Plain Language Summary, not published)
Key objectives of Phase 5 (2015-2020) of the Targeted Geoscientific Initiative (TGI) program of Natural Resources Canada and the Geological Survey of Canada were to generate new knowledge, methodologies, and models to enhance the exploration industry's ability to detect buried ore deposits and extensions of existing ore systems, and to provide models for targeting new deposit areas. This synthesis volume contains nine individual papers that discuss deposit scale to magmatic system fundamentals from various Canadian examples pertaining to the TGI-5 Ni-Cu-PGE-Cr project.
GEOSCAN ID326890

 
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